TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
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TM 9-2320-387-24-l REFERENCE INFORMATION A healthy engine should crank at least 100 mm when it‘s cold and at least 180-206 rpm when it’s warm. If the engine doesn’t crank at normal speed, it could be due to a starter or battery circuit fault or it may be due to an internal engine problem. Oil pressure may go as high as 60 psi (552 kPa) if the engine is cold and should be 10 psi minimum at idle speed. You should check the oil pressure with the STEIICE-R (test 50) using 1,000 psi (6,895 kPa) transducer (blue stripe). Check pressure at idle and at 2,000 rpm. If pressure is low, check oil level and condition. Add or change oil as required. COMPRESSION / MECHANICAL ENGINE RPM STOICE-R TEST 10 I 1. Start Test 10, Engine RPM. 2. Crank or start the engine. Displayed reading is RPM. Cranking rpm should be approximately 100-200. Idle rpm should be 625 - 675. OIL PRESSURE fl OIL PRESSURE STEhCE-R TEST 50 1. Install STEIfCE-A 0 to1000 PSI (O-6.895 kPa) transducer (blue stripe) in place of oil pressure sending unit. 2. Connect to STEIICE-R TK connector J2 or J3. 3. CAL with engine off. 4. Start engine. Run test 50. With the engine warm, oil pressure should be 10 psi (69 kPa) minimum at idle and 40-45 psi (275-310 kPa) at 2.000 rpm. Pressure may go as high as 80 psi (552 kPa) when the engine is cold. 2-149